Head support for operation chairs of any kind



May 14, 1929. '6, m 1,713,361

HEAD SUPPORT FOR OPERATION CHAIRS OF ,ANY KIND Filed Feb. 7, 1928 Patented M ty 14,1929. I I I UNITED STATES PATENT OFFICE.

v 7 i GUSTAV ZETTEL, or annular, eERManY. i 7 HEAD SUPPORT, FOR OPERATION CHAIRS OF ANY i V Application.file ir y 7,1928, Serial '52,582, and in Germany Februa y 5, 1927Av This invention relates to a head-support phere through a hole 70 so that, when by a for operation-chairs, of any character which pressure of the head against the arched surhead-support is yieldable and covered with face of the cushion this surface is indented, an extensible, flexible and aseptic skin. the original shape of the top 6 is reestablished 4 5 The head support according to the present as soon as the pressure of the head ceases invention, consists of a cushion of elastic owing to the inflow of air through hole is into material having an arched surface which, due the hollow space 2', there being a correspond- I to the elasticity of the material, gives slightly ing hole v in sleeve (Z. V. when the head is pressed against the same to It is not necessary to fill the elastic cushion 50 such an extent that the hollow body insures with filling material.

the steady position of the head, which is ab- I claim solutely necessary for the operation. 1. A head-support for operating chairs in- The preferred material for'carrying out eluding a hollow elastic member having a this invention is rubber formed in the shape substantially cylindrical wall, a convex-wall 1 of a hollow body with arched surface, this at one end .of said substantially cylindrical surface becoming concave at the point against wall and a rim disposed at an angle to the which the head presses,but resuming its orig- Junction of the convexwall with the subinal arched shape as soon as this pressure stantially cylindrical wall,a removable elas ceas s. Y i tic aseptic covering engageable with the rim The arched surface of the cushion is 00V and spanning the convex wall, said substanered with an extensible, flexible, aseptic and tially cylindrical wall having an inlet openwater-proof skin which has a beaded edge de ing, and a supporting member comprising a signed to be pulled over the elastic rubbera bottom and. a flange extending upwardly 1 cushion, said skin yielding with the arched around the other end of the cylindricalwall,

5 surface of the cushion under the pressure said flange having an opening to coincide exerted by the head of the patient. with that of the substantially cylindrical wall I A headsupport according to the invention support. is shown, by way of example, in vertical sec- 2. A head-rest for operating chairs includtion in the single figure of the accompanying ing a hollow substantiallycircular peripheral 30 drawing. member and a pliable normally convex por- A hollow body a of any convenient elastic tion at oneend of said member surrounded material, for instance, rubber, has an arched by an outwardly flared rim, a cup-shaped surface 6, the thick edge 0 at the open end of member fitting upon the other end of-said pethe hollow body being closed by a capsule or ripheral'member, said; peripheral member sleeve (Z. and said cup-shaped member being provided The arched surface I) is coveredwith an with alined ports, and an elastic aseptiecow extensible, waterproof, washable, aseptie skin ering having a tensioned rim adapted to be I for instance, a rubber skin, the beaded edge applied over and to grip the flared rim and to V g of which is pulled over the projecting edge cover'saidconvex portion. 40 h of the hollow body a. The hollow space i In testimony whereof I affix my signature.

of the body a communicates with the atmos- GUSTAV ZETTEL. 

